Question

Determinati elementele multimii A={n€N |(n+1)|(n+12)}​

Answer 1

A={n∈N |(n+1)|(n+12)}​

(n+1)|(n+12)

(n+1)|(n+1)

(n+1)|(n+12-n-1)

=>(n+1)|11

n+1∈{1; 11}

=> n∈{0; 10}

A= {0; 10}